DWK Life Sciences 28016-250 Flask,Volume,Classa,Raysorb,Ptfe,250ml, KIMBLE®, 12/Unit - 09-503 | Genesee Scientific DWK Life Sciences 28016-250 Flask,Volume,Classa,Raysorb,Ptfe,250ml, KIMBLE®, 12/Unit - 09-503 | Genesee Scientific